| US 7,514,916 B2 | ||
| CCP-CPP-GMR head assembly, magnetic recording/reproducing apparatus, and specification method of appropriate sense current direction of CCP-CPP-GMR head | ||
| Tomomi Funayama, Hino (Japan); Kohichi Tateyama, Yokohama (Japan); and Masayuki Takagishi, Kunitachi (Japan) | ||
| Assigned to Kabushiki Kaisha Toshiba, Tokyo (Japan) | ||
| Filed on Aug. 07, 2007, as Appl. No. 11/834,855. | ||
| Application 11/834855 is a division of application No. 10/985886, filed on Nov. 12, 2004, granted, now 7,304,825. | ||
| Claims priority of application No. 2004-052362 (JP), filed on Feb. 26, 2004. | ||
| Prior Publication US 2007/0291421 A1, Dec. 20, 2007 | ||
| Int. Cl. G01R 33/09 (2006.01); G11B 5/39 (2006.01) | ||
| U.S. Cl. 324—210 [324/213; 360/324] | 2 Claims |
| 1. A specification method of an appropriate sense current direction of a CCP-CPP-GMR head, comprising:
providing the CCP-CPP-GMR head with a sense current of a first polarity to measure a noise level;
providing the CCP-CPP-GMR head with a sense current of a second polarity opposite to the first polarity to measure a noise
level; and
comparing a noise level in the first polarity and a noise level in the second polarity and specifying a sense current direction
of the first polarity or the second polarity which gives a smaller noise level between the both noise levels as the appropriate
sense current direction.
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